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Merge pull request #4431 from pipecat-ai/filipi/tts_deadlock

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Fixing TTSService deadlock.
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Filipi da Silva Fuchter
2026-05-06 14:52:04 -03:00
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parent 37376b3506 4512038a17
commit 90f0f7cd27
3 changed files with 156 additions and 1 deletions
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- Fixed a deadlock in `TTSService` that could permanently stall pipeline processing when all three conditions occurred together: `pause_frame_processing=True`, an interruption arrived before any TTS audio was played, and an `UninterruptibleFrame` (e.g. `TTSUpdateSettingsFrame`, `FunctionCallResultFrame`) was in the processing queue at that moment. The process task would block on `__process_event.wait()` indefinitely because `BotStoppedSpeakingFrame` never arrives (no audio was played) and the interruption handler did not resume processing. Affects services using `pause_frame_processing=True` such as ElevenLabs, Rime, AsyncAI, Gradium, and ResembleAI.